Electrically-heated device.



J4.,v F., LAMB. Y ELECTRIGALIY HEATED DEVICE. APPLLoATIon rILgD In a1.,V v1912.

Patented 111112111913.

m a: L. V.. Rn m m o MJ l/ /3 2 Jrs. vnf

J. F. LAMB.

ELBCTRICALLY HEATED DEVICE. APPLIUATION FILED MAY s1. 1912.

Patented Apr. 29, 1913.

2 SHEETS-SHEET 2.

WITNESSES lN'VENTOR Joseph I7. Lamb.-

- UNITED STATES PATENT oEEioE.

JOSEPH F.' LAMB, OF NEW BRITAIN, CONNECTICUT, -ASSIGNOR TO LANDERS, FRARY & CLARK, F NEW BRITAIN, C0lfh'CTlCll'T,` A CORPORATION OF CONNECTICUT.

ELECTRICALIYI-IEATED DEVICE.

Specification of Letters Patent.

Patented Apr. 29, 1913.

applicati@ inea may 31, 1912. seriai No. 700,573.

To ZZ whom it may concern:

1e it known that I, JosErH F. LAMB, a citizen of lthe vUnitedv States, and a resident of New Britain, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Electrically-Heated Devices, of which the following is a specification. l

rlhe object of this invention is to produce an electrically-heated device such as a stove, flat iron, or the like, having features of vnovelty and advantage.

More especially, by my invention I provide means for distributing the heat evolved in the heating un'it to the surface to be heated without special reference to the location of the heating unit relative to the surface to be heated. This makes it possible to use heating units, the design and construction of whichare in general like or.

similar, in connection with devices of varions kinds, as distinguished from making a special form of unit for each device which it This result is accom- I is desired to heat. plislied partly through the construction of the unit, which in essential features is the same for various uses, its shape merely being changed, and partly to the manner of mounting the unit in the device, and especially in the method of transmitting the heat from theunit, or its holder, to various parts of the surface to be heated.

I have illustrated two embodiments of the invention for the purpose of clearly disclosing its various features.

Figures 1, 2, 3 and 4 show the invention Figs. 5 and 6 show embodied in a sad iron. the invention embodied in a stove, or heatving plate. Fig. 1 is aside view of'a sad iron.. Fig. 2 is a plan view thereof with the top removed. Fig. 3 is a side view of what is shownin Fig. 2. Fig. 4 is a central vertical section of whatis shown in Figs. 2 and 3. Fig. 5 'is a side view of a stove, the base being broken away and the heating plate shown in section. Fig. 6 is a bottom view of the heating plate.

Referring to Figs. 1 to 4 inclusive, the iron is denoted at a, and Z) is the cover secured thereto as. by the screws d L The cover may be weighted if desired and is provided with a suitable handle c. The heating unit l is located on a support or platform '2 recessed as illustrated. 3 denotes thesurface to be heated which in this case is the sole of the iron. A recess 4 is formed between the platform 2, on which the .unit is located, and the surface to be heated, the recess being connected with the base by the'side webs 10, 10, the rearwardly pro- ]ecting ribs 11, 11 and theghforwardly eX- tending web or tip 12. Since as shown these webs and ribs are formed integrally with the surface to be heated and with the socket, it will be seen that they are in heatconductive relation with both and so constitute an effective means for transmitting the heat evolved in the 'unitfrom the plat-- form or recess to the surface to be heated. The size or cross sectional area of these webs or ribs is calculated to produce the amount of heat-ing effect which -is desired. A preferred type of heating unit is illustrated and comprises a flat core of insulating material, such as mica, about which is wound a resistance coil 15 on either side of which are thin layers of insulating material 16, 17, such as mica. A s illustrated the bottom of the recess or platform 2 forms one of the radiating plates, and on the opposite side of the unit there is located the radiating plate 18 having the edge ange 19 arranged in heatconductive relation with the side' walls of the socket. It will thus be seen that substantially all of the heat evolved in the unit A,is transmitted directly to the bottom and walls of the recess in which it is located, and by the webs and ribs 10, 11, 12 transmittedl to the surface to be heated. r[he spacing of the bottom of the socket from the surface to be heated, as by the recess 4, is advisable in cases where otherwise the central portion of the surface to be heated,

as the sole of the iron, would be overheated. It will be seen that when the cover Z) is in place it provides an envelop of dead air surrounding the socket, ribs and heating unit, preventing to a large degree the dissipation of the heat. Other webs may be utilized in order to get a proper distribution of the heat as indicated at 20..

Referring particularly to Figs. 5 and 6 which'show my invention embodied in a stove, 30 denotes the surface to be heated, 31 the platform to which the unit 32 is secured, 33 the socket in which the unit is located, a radiating plate 34 of the unit being in heat-conductiverelation withthe theiheat from the unit to the different parts of the 'surface to be heated. 36 denotesan air space between the platform andthe surface to be heated, and 37 a central web which may be used in caseswhere it is desired to conduct some ofthe heat directly to the center of the plate 30 in order to accomplish a properheating effect.

From 'a study of the two devices used as illustrations' as embodiments of the inven tion, it will be4 seen that Within reasonable limits the relative positions of the surface to be heated and the platform on which thel unit is located is not material s'incemeans are provided for carrying the'heat'to different points and in proper or desirable amounts. Changes in the relative positions of the surface to be heated and the unit will probably require changes in the number and cross sectional area of the conducting webs. It .will also be observed that by my invention, .it is possible to use a ,practically standard form of unitfor heating various devices rather than construct and shape the unit for special uses. v

I do not wish to be understood as limitingv the adaptation of my invent-'ion to the embodiments` which have been selected afor illustration es Iam aware that there lare various devices inl which the present inven. tion'can be utilized by changing the form or shape of the parts, but still retaining the important features here disclosed.

l. In a device of the character described a mass of heatconducting material comprising heat-receiving and heat-'yielding sections connected together .at different? points by Webs of desired heat conduct-ive capacity, and an electrical heater arranged in heating relation with said heat-yielding section.

2. In a device of the character described a mass of heatconducting material,l comprising heat-receiving and heat-yielding sections spacedfrom one another insome portions andconnected together at other points by webs of desired heatconductive capacity,

and an'electrical heater arranged in heating relat1on with said heatyielding section.

3. Ina. device of the character described a mass of heat conducting material comprisi ing heat-receivingI and heat-y1eld1ngl sec-A y tions, the latter being provided with a socket, said 'sections being connected together by'webs of suitable heat conductivey capacity, and an electrical heater located in f said socket in heating relation with said heat-yielding section.

4. In a device of the character described asurface to be heated, a platform formed integrally therewith but spaced therefrom in capacity, a flat electrical heater located on .the platform and a plate of heat conducting material arranged against the upperside of vsome portions and connectedI ,thereto at other vpoints by webs of desired heat conductive the heater and in heat conductive relation with theV platform.

' 5. In a device of the character described a surface to be heated, a platform formed integrally therewith but'spaced therefrom in someportions and connected thereto at other" points by webs of desired heat conductive capacity, said platform being providedwith a socket, a lflat electrical heater located withvin lthe'socket against the upper side of.said

heater and in heating relation with the walls of the socket.

6. In a device of the character described i a mass of heat conducting material, com 'prising heat-receiving and heat-yielding sections, the latter being provided with a socket, said sections vbeing ,onnected together by webs of suitable heat conductive capacity, an electrical heater located in said socket in heating relation With the said heat l.yielding section, and a plate of conducting 

